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The total of phenolic components was estimated by the Folin-Ciocalteu method, while the determination of flavonoids by a colorimetric method using AlCl3. The estimation of sugar content was done with the colorimetric method of anthrone. Then the phytochemical composition analysis of staphidine was further done. The researchers identified quercetin and kaempferol, glucose, sucrose, fructose and valine. The results of this study showed that the colorimetric analyzes had a high content of sugars but also a high polyphenolic content which is almost ten times that of raisins. According to them, the antioxidant capacity appeared extremely high, while staphidine also reduced peroxidation by 83%. This means that staphidine is of high nutritional value and an excellent antioxidant for the body, and for this reason, the researchers said, it is indicated for further study.
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